Ah, thanks a lot. but this did not help.
I've changed the build.xml, ONE changeset.xml (I didn't find more of them), a lot of js files and even the jbpm.console.properties and jbpm-gwt-corexxxx.jar in the jbpm-gwt-console-server.war.
I did not find anywhere a drools.xml and if there are more than one changeset.xml I even did not find them:(